| Hazard Class | EC (µS/cm) | Quality | Wet No % | Dry No % | ||
| C0 | 0 - 100 | Excellent | 4 | 20 | 6 | 30 |
| C1 | 101 - 250 | Very Good | 13 | 65 | 8 | 40 |
| C2 | 251 - 750 | Good | 3 | 15 | 6 | 30 |